Environment Natural environment
In biology and ecology the environment is all of the natural materials and living things, including sunlight. This is also called the 'natural environment'. Some people call themselves 'environmentalists'. These people think that harmony with the environment is important. The important things in the environment that we value are called natural resources. For example fish, sunlight, and forests. Non-renewable' natural resources are important things in the environment that do not come back naturally, for example coal and natural gas.