Recycling

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Will we eventually have to send our trash into space if we run out of room on Earth? Aiden, age 13, Maryland Heights, Mo. Our planet holds a lot of trash. Since the Industrial Revolution, we humans have produced 30 trillion tons of stuff – from skyscrapers and bridges to clothes and plastic bags. Much of it is still with us in the form of waste. Globally, people add 350 million tons to this total every day. What’s worse, much of the world’s garbage is mismanaged – dumped on land, in waterways and in open dumps in cities and towns. This exposes people to serious health risks. It harms plants and soil, and a lot of waste finds its way into the oceans. Thinking about what a mess we’re making can be pretty ove...

If the TV series “Dirty Jobs” covered animals as well as humans, it would probably start with dung beetles. These hardworking critters are among the insect world’s most important recyclers. They eat and bury manure from many other species, recycling nutrients and improving soil as they go. Dung beetles are found on every continent except Antarctica, in forests, grasslands, prairies and deserts. And now, like many other species, they are coping with the effects of climate change. I am an ecologist who has spent nearly 20 years studying dung beetles. My research spans tropical and temperate ecosystems, and focuses on how these beneficial animals respond to temperature changes. Insects don’t use internally generated heat to maintain their body temperature. Adults can take actions such as moving to warmer or colder areas. However, earlier life stages such as larvae are often less mobile, so they can be strongly affected by changing temperatures. But dun...