B. Europe is the world's second smallest continent.
C. The European Union has the largest economy in the world.
D. The European Union has a limited role in the foreign policy of member nations.
Europe's coastal location and temperate oceanic climate, both suitable for trade, have enabled the European Union to have the largest economy in the world. The EU accounts for an estimated 30% of the gross world product, ahead of the United States, China, and Japan.
drought
flooding
overpopulation
A key problem caused by the burning of fossil fuels is acid rain, which is formed when sulphur and nitrogen compounds within the fuels react with the atmosphere. This rain can damage ecosystems and buildings.
One significant problem caused by the burning of fossil fuels is acid rain. Fossil fuels such as coal, oil and gas contain sulphur and nitrogen compounds which, when burned, react with the atmosphere to create sulfurous and nitrous acids. These acids then mix with precipitation, leading to acid rain. Acid rain can harm aquatic ecosystems and damage plants, buildings and statues.
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