1. One effect of global warming is that sea levels are rising. The polar icecaps are melting. (because) _______________________________________________________________________________ 2. The global population has increased. There are much better levels of nutrition. (because of) _______________________________________________________________________________ 3. Nuclear explosions and detonations of nuclear weapons cause radioactive pollution. (lead to) _______________________________________________________________________________ 4. More and more roads are being built. Air pollution is rising. (as a consequence) _______________________________________________________________________________ 5. The fish and other aquatic animals have died. The water is polluted. (due to) _______________________________________________________________________________