a mixture of gases that surrounds any planet

The natural environment in which an animal or plant usually lives:

soil aka

a situation in which something no longer exists

harvest aka

water that falls from the clouds towards the ground, especially as rain or snow:

a series of living things that are connected because each group of things eats the group below it in the chain

the addition of nutrients to water in lakes and rivers, which encourages plant growth that can take oxygen from the water and kill fish and other animals

someone who catches and kills animals illegally

The frozen water at the very top or bottom of our globe

to keep and protect something from damage, change, or waste

A plant or animal that has had some of its genes changed scientifically

the systems for taking dirty water and other waste products away from buildings in order to protect people's health