When any type of fuel is burnt, lots of different chemicals are produced.Some of these gases react with the tiny droplets of water in clouds. The rain from these clouds is known as "______ ________".

The three most important _____ _______ are coal, petroleum, and natural gas

I have a ________ _______ _______ which I always use when I go shopping

An __________ ________ is a species which is very likely to become extinct as for example the tasmanian devil or the red panda

Inhaling factories and industries ______ is very dangerous for our health, increasing the probability of diseases like asthma

Global __________ will continue to rise for decades to come, largely due to greenhouse gases produced by human activities.

___________ is an adjective used to mean causing little or no damage to the environment and therefore able to continue for a long time.

___________ energies (sun, rain, wind, tides,waves and heat) are sources of clean, inexhaustible and increasingly competitive energy.

I always ______ glass bottles

Global temperatures will continue to rise for decades to come, largely due to _____ ______ produced by human activities

Without a way to reduce waste at the ________, the city ordered an expansion of the pit for another two miles

In the future, paper books will no longer be produced to save trees from being ___ ____