Desertification is a form of land degradation in which a relatively dry land region becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife.

In-situ conservation involves the conservation of species within their natural habitats, such as National Parks or Wildlife Sanctuaries.

Normal rain has a pH of about 5.6; acid rain typically has a pH lower than 5.6 due to dissolved sulfur and nitrogen oxides.

Nuclear energy relies on uranium, which is a finite resource found in the Earth's crust, making it non-renewable.

The IUCN (International Union for Conservation of Nature) maintains the Red List of Threatened Species, often referred to as the Red Data Book.

Minamata disease is a neurological syndrome caused by severe mercury poisoning, first discovered in Minamata, Japan, in 1956.

CFCs break down in the stratosphere, releasing chlorine atoms that catalyze the destruction of ozone molecules, leading to the depletion of the ozone layer.

The Kyoto Protocol was an international treaty that extended the 1992 United Nations Framework Convention on Climate Change to reduce greenhouse gas emissions.

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.

Enteric fermentation in the digestive systems of ruminant animals like cattle produces large amounts of methane, a potent greenhouse gas.

The Montreal Protocol is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion.

Biodiversity refers to the variety of all living organisms and the ecological complexes of which they are a part.

Ground-level ozone and nitrogen dioxide are key components of photochemical smog, which forms when sunlight reacts with pollutants from vehicle emissions and industrial activity.

Oil spills coat marine animals, harming their insulation and buoyancy, while toxic components disrupt the entire food web.

Biomass is organic material that comes from plants and animals, and it is a renewable source of energy.

CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) ensures that international trade in specimens of wild animals and plants does not threaten their survival.