What is the main idea of the news item? [originaltext] American scientists sa

American scientists say many tropical insects could face extinction by the end of this century unless they adapt to predict rising temperatures. They say climate change in the tropics could have secondary effects on plant pollination and food supplies. Here’s our science correspondent Christine McGourty. The researchers studied data on dozens of insect species from around the world, looking at temperature changes between 1950 and 1990, and how the insects were affected The aim was to predict how they’d cope in the late 21st century, if temperatures increase as many scientists predict The results show that insects in countries at higher latitudes, in Britain, for example, should cope best But the impact could be far worse in the tropics where insects are more sensitive to even small temperature changes.