Review pre a1

People who cycle to work help to _____e p________ in cities.

A product or resource is r_____ when it is used again for the same purpose.

You _h___ ___y products that you don't want any more.

_____n __i_____s are produced from the burning of coal, oil or wood.

A product or resource is __c_____ when it is made into a new product.

an ___-________ product or action helps to protect the environment.

The quantity of electricity or gas that you use is your _n____ _o________n

The sun and the sea are r________ s_____s of energy that will always be present.

_l___ _a_____ is the regular increase in world temperatures