A - Supply the correct tense of the verb in brackets:
FIRST CONDITIONAL: IF + PRESENT SIMPLE - FUTURE / MODAL + INFINITIVE
1- If we __________ (not do) something to reduce the amount of CO2 in the atmosphere, the temperature will go on rising.
2- If you put engine oil in water, you __________ (pollute) it.
3- If people don't protect rainforests, many important animal and plant species __________ (not survive).
4- If you __________ (talk) to him, he will understand your decision.
5- If the weather is fine tomorrow, we __________ (go) to the beach.
6- You will cut off the electricity if you __________ (pull out) that plug.
7- Unpredictable ecological disasters __________ (fall) upon our heads if the forest is destroyed.
8- The world __________ (reach) an era of peace and liberty if they manage to ban nuclear weapons.
SECOND CONDITIONAL: IF + PAST SIMPLE - CONDITIONAL / MODAL + INFINITIVE
1- If the rainforest was destroyed, __________ (there be) a terrible drought.
2- If I __________ (be) you, I would join a green organization.
3- The river wouldn't be so polluted if factories __________ (not dump) waste into it.
4- If the beaches were declared unhealthy, we __________ (not use) them.
5- We __________ (have) cheap energy if the house had a solar panel.
6- They __________ (destroy) considerable tracts of the precious rainforest if they insisted on building a power plant.
7- If Sharon __________ (not care) about the environment, she wouldn't separate her garbage.
8- We __________ (not waste) so much water if we took showers instead of baths.
