The carbon cycle

The _______ of co2 into plants and the sea is a natural process

We use the word _____ for everything in the natural world, plants, animals, air, etc.

The word ______ is a combination of hydrogen and carbon.

Scientists working on ________ projects want to find a way to reduce CO2 in the atmosphere.

Emissions that come from cars and factories are called _________.

Humans have been adding more and more CO2 to the ______ since the industrial revolution.

______ are chemical products that are made from hydrocarbons

Nuclear power stations don't __________ CO2 but many people worry that they are not completely safe

Plants _________ Co2 from the atmosphere, and then release it again if they are burned.

Coal, oil and gas are called ________ because they are made from plants and animals that lived millions of year ago.

________ is a chemical with one carbon atom and two oxygen atoms.

Exhaust gas _________ from the burning fossil fuels are causing global warming.