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- Rachel Carson Prize (environmentalist award)International environmental award for women
- Radiation Control for Health and Safety Act of 1968Radiation Control for Health and Safety Act of 1968 was an amendment to the Public Health
- Radiation Effects Research FoundationThe Radiation Effects Research Foundation (RERF) is a joint U.S.-Japan research organizati
- Radiation Exposure Compensation ActThe United States Radiation Exposure Compensation Act (RECA) is a federal statute implemen
- Radioactive contaminationUndesirable presence of radioactive substances
- Radioactive contamination from the Rocky Flats PlantEnvironmental contamination by nuclear weapons production
- Radioactive wasteUnusable radioactive materials
- Raimonds VējonisPresident of Latvia from 2015 to 2019
- Rainbow HerbicidesHerbicides used by the US in the Vietnam War
- Rainforest AllianceInternational sustainable agriculture organization
- Rainforest Foundation USNon-profit organization based in the U.S.
- Rainwater harvesting in the United KingdomRainwater harvesting in the United Kingdom is a practice of growing importance. Rainwater
- Rainwater managementRainwater management is a series of countermeasures to reduce runoff volume and improve wa
- RakaliThe rakali (Hydromys chrysogaster), also known as the rabe, the "Australian Otter" or wate
- Ralf SeppeltGerman mathematician
- Rame Head (Victoria)Ram Head or since 1970 Rame Head (37°46′S 149°29′E / 37.767°S 149.483°E) is a coastal head
- Ramsar siteWetland sites designated to have international importance by the Ramsar Convention
- Rance Tidal Power StationDam in Brittany
- Rancho Seco Nuclear Generating StationDecommissioned power plant in California, US
- Range extenderFuel-based auxiliary power unit that extends the range of a battery electric vehicle
- Rational basis reviewIn U.S. constitutional law, rational basis review is the normal standard of review that co
- RDS-11949 Soviet nuclear bomb test
- RDS-37Soviet hydrogen bomb first tested in 1955
- Reactor-grade plutoniumReactor-grade plutonium (RGPu) is the isotopic grade of plutonium that is found in spent n
- Rear mid-engine, rear-wheel-drive layoutIn automotive design, an RMR, or rear mid-engine, rear-wheel-drive layout is one in which
- Rebound effect (conservation)Increase in consumption following energy or resource savings
- Reclaimed waterConverting wastewater into water that can be reused for other purposes
- Reconciliation ecologyStudy of maintaining biodiversity in human-dominated ecosystems
- Recycling by productRecycling methods by type of product
- Recycling in JapanRecycling in Japan (Japanese: リサイクル, romanized: Risaikuru), an aspect of waste management
- Recycling in TaiwanTaiwan has one of the most efficient recycling programs globally, with a 55% collection ra
- Recycling in the United StatesThere is no national law in the United States that mandates recycling. State and local gov
- Red Hill Underground Fuel Storage FacilityMilitary fuel storage facility in Hawaii
- Red–green alliancePolitical coalition between parties
- Refugio oil spill2015 pipeline leak on the coast of California
- Refugio State BeachRefugio State Beach (Chumash: Qasil, "Beautiful") is a protected state beach park in Calif
- Registration, Evaluation, Authorisation and Restriction of ChemicalsEuropean Union regulation
- Regulation and monitoring of pollutionTo protect the environment from the adverse effects of pollution, many nations worldwide h
- Regulation of frackingCountries using or considering to use fracking have implemented different regulations, inc
- Regulatory reformRegulatory reform concerns improvements to the quality of government regulation.
- Regulatory scienceRegulatory science is the scientific and technical foundations upon which regulations are
- Relationship between animal ethics and environmental ethicsThe relationship between animal ethics and environmental ethics concerns differences betwe
- Religion and environmentalismInterdisciplinary subfield
- Religious terrorismTerrorism motivated by religious beliefs
- Remediation of per- and polyfluoroalkyl substancesRemediation of per- and polyfluoroalkyl substances refers to the destruction or removal of
- Renault MidlumThe Renault Midlum is a range of trucks with a weight between 7.5 and 19 tonnes made by Re
- Renewable Energy Directive 2018European Union Directive for promoting renewable energy
- Renewable energy in AfricaThe developing nations of Africa are popular locations for the application of renewable en
- Renewable energy in AsiaAsia may help lead the renewable energy era. Here is how Ember describes it: Electricity i
- Renewable energy in BrazilAs of 2024, renewable energy accounted for about 88% of the electricity used in Brazil—one
- Renewable energy in CanadaRenewable energy in Canada represented 17.3% of the Total Energy Supply (TES) in 2020, fol
- Renewable energy in ChinaChina is the world's top electricity producer from renewable energy sources. China's renew
- Renewable energy in ColombiaAs of 2023, Colombia's renewable electricity generation capacity was 14.3 GW. Most of this
- Renewable energy in Costa RicaRenewable energy in Costa Rica supplied about 98.1% of the electrical energy output for th
- Renewable energy in EthiopiaEthiopia generates most of its electricity from renewable energy, mainly hydropower. The c
- Renewable energy in FinlandRenewable energy in Finland increased from 34% of the total final energy consumption (TFEC
- Renewable energy in HondurasIn Honduras, there is an important potential of untapped indigenous renewable energy resou
- Renewable energy in HungaryHungary is a member of the European Union and thus takes part in the EU strategy to increa
- Renewable energy in South DakotaRenewable energy in South Dakota involves production of biofuels and generation of electri
- Renewable energy in the Czech RepublicRenewable energy in the Czech Republic describes the renewable energy related development
- Renewable Fuel Standard (United States)American federal transportation program
- RenovationImproving a broken, damaged or outdated structure
- Reorganization Plan No. 3 of 1970US presidential directive
- Repair CaféVenues where people gather and repair everyday items
- Reservation povertyPoverty on Native American reservations
- Resource Conservation and Recovery ActFederal law in the United States
- Resource efficiencyMaximizing effect while minimizing waste
- Resource intensityResource intensity is a measure of the resources (e.g. water, energy, materials) needed fo
- Resource justiceResource justice (also referred to as "resource equity" or "resource governance") is a ter
- Responsible miningResponsible mining is commonly defined as mining that involves and respects all stakeholde
- Resurgence (pest)Effect of pesticide use
- Retention basinArtificial pond for stormwater runoff
- Rhinoceros iguanaThe rhinoceros iguana (Cyclura cornuta) is an endangered species of iguana that is endemic
- Rhodesia and weapons of mass destructionAlthough many other countries have possessed chemical and biological weapons programs, Rho
- Richard Kim (car designer)Richard Kim (born 1981) is a Korean-American car designer, known for his work on the BMW i
- Rick FedrizziRick Fedrizzi is the founding chair and former CEO of the U.S. Green Building Council (USG
- Ridgeway, South CarolinaRidgeway is a town in Fairfield County, South Carolina, United States. The population was
- Right to knowPhilosophical concept and legal principle
- Right-of-way (property access)The type of right of way (also right-of-way) considered here, is an easement, granted, pur
- Rights of way in England and WalesIn England and Wales, excluding the 12 Inner London boroughs and the City of London, the r
- Rim Rock Wind FarmWind farm in Montana, USA
- Ringwood Mines landfill siteFormer iron mining site in the borough of Ringwood, New Jersey
- Ringwood State ParkRingwood State Park is a 4,444 acres (17.98 km2) state park in Passaic County in northeast
- Rio Tinto (river)River in Spain coloured red
- Riparian-zone restorationEcological restoration of river banks and floodplains
- Robin Wood (environmental organisation)Robin Wood is based in Bremen and, in 2008, was composed of fifteen mostly autonomous regi
- Rocky Flats PlantDefunct American nuclear weapons manufacturing site in Colorado
- Rodale, Inc.Rodale, Inc. (), was an American publisher of health and wellness magazines, books, and di
- Roger Tory Peterson InstituteMuseum and nature center in Jamestown, New York, United States
- RoHS2003 European Union directive on hazardous materials
- Romania and weapons of mass destructionRomania started pursuing nuclear technology, according to some scholars, as early as 1967.
- Rössing uranium mineOpen-pit uranium mine in Namibia
- Rotterdam ConventionUnited Nations treaty
- Roundtable on Sustainable Palm OilAgreement on palm oil supply
- Roundup (herbicide)Glyphosate-based herbicide made by Monsanto
- Ruckus SocietyThe Ruckus Society is a nonprofit organization that sponsors skill-sharing and non-violent
- Rudie van VuurenNamibian physician, conservationist and sportsman
- RurrenabaqueRurrenabaque is a small town in the north of Bolivia, on the Beni River. It is the capital
- Russia and weapons of mass destructionThe Russian Federation possesses the world's largest arsenal of nuclear weapons, consistin
- Ryanggang explosionThe Ryanggang explosion was a large explosion that took place in North Korea on 9 Septembe