Here are few environmental terms from every letter of the alphabets.

A - Acid rain: A type of precipitation that has high levels of acidic compounds, caused by emissions of sulfur dioxide and nitrogen oxides from industrial activities and transportation.

B - Biodiversity: The variety of life on Earth, including the number of species, genetic diversity, and the range of ecosystems.

C - Climate change: The long-term changes in Earth's climate, including changes in temperature, precipitation, and sea level, caused by human activities such as burning fossil fuels and deforestation.

D - Deforestation: The permanent removal of forests to clear land for other uses, such as agriculture or development, which contributes to habitat loss, climate change, and biodiversity loss.

E - Ecosystem: A community of living organisms (plants, animals, and microbes) interacting with each other and their physical environment.

F - Fossil fuels: Non-renewable energy sources, including coal, oil, and natural gas, formed over millions of years from the remains of ancient plants and animals.

G - Greenhouse gases: Gases that trap heat in Earth's atmosphere, including carbon dioxide, methane, and nitrous oxide, contributing to global warming and climate change.

H - Habitat: The natural environment where a particular plant or animal species lives and thrives.

I - Invasive species: Non-native species that have been introduced to an ecosystem and can cause harm to native species and the environment.

J - Junk mail: Unsolicited mail that contributes to deforestation and waste.

K - Keystone species: A species that plays a crucial role in the functioning of an ecosystem, often by controlling populations of other species.

L - Landfill: A site where waste is buried in the ground, causing environmental pollution and contributing to climate change through the release of greenhouse gases.

M - Microplastics: Tiny plastic particles that accumulate in the environment, posing a threat to wildlife and potentially human health.

N - Natural resources: Resources that come from the natural environment, including water, air, land, minerals, and forests.

O - Ozone layer: The layer of ozone in Earth's atmosphere that absorbs most of the sun's harmful ultraviolet radiation, protecting life on Earth.

P - Pollution: The presence or introduction of harmful substances into the environment, such as air pollution, water pollution, and soil pollution.

Q - Quality of life: The overall well-being of individuals and communities, which is affected by environmental factors such as access to clean air and water, and a healthy ecosystem.

R - Renewable energy: Energy sources that can be replenished naturally, such as solar, wind, hydro, and geothermal power.

S - Sustainability: The ability to meet the needs of the present without compromising the ability of future generations to meet their own needs.

T - Temperature: A measure of the average kinetic energy of the molecules in a substance, including the atmosphere, which affects climate and weather patterns.

U - Urbanization: The process of urban growth, which can lead to habitat loss, pollution, and other environmental issues.

V - Volatile organic compounds (VOCs): Chemicals that evaporate at room temperature and contribute to air pollution and health problems.

W - Water cycle: The continuous movement of water on Earth, including evaporation, condensation, precipitation, and runoff, which affects weather patterns and water availability.

X - Xenobiotics: Chemicals that are foreign to the environment, often synthetic, and can have negative impacts on wildlife and human health.

Y - Yield: The amount of a crop or other product produced per unit of land, which affects food security and environmental sustainability.

Z - Zero waste: The practice of reducing, reusing, and recycling materials to eliminate waste and conserve resources.