I .................. (not pass) if I ................. (not study) harder.
won't pass / don't study
What are the three Rs of the environment?
Reduce, reuse, recycle
If we only …………………… (use) the water we need, we …………………… (contribute) to our planet's recovery.
use / will contribute
If he ...................... (be) late, I ....................... (miss) the bus
is / will miss
An extended period of unusually dry weather with no rain or other precipitation
Drought
What's happening to the ice?
It's melting
If it .................. (rain), I ...................... (take) my umbrella
rains / will take
A gradual increase in the temperature of the earth's atmosphere generally attributed to the greenhouse effect.
Global warming
The problem caused by increased quantities of gases such as carbon dioxide in the air. These gases trap the heat from the sun, and cause a gradual rise in the temperature of the Earth's atmosphere.
Greenhouse effect
The process of converting waste materials into new materials and objects.
Recycling
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