What is artificial photosynthesis, how does it work, and why would we need it?
Plastic debris is killing the ocean’s “invisible forests,” which produce ten percent of the oxygen we breathe.
Burning household trash in massive incinerators saves landfill space, but it also introduces a host of other waste management issues.
Even the smallest city dwelling has enough space for a mini-meadow or a few flower pots.
New York City's urban agriculture has not been found to provide benefits to either hungry people or the environment. How could city farms work better?
A hundred years later, we are still learning.
In addition to cleaning air pollution, trees absorb excess nutrients from soil, preventing algae blooms in waterways.
Workers are still cleaning up after the 2011 Fukushima Daiichi nuclear power plant partial meltdown. There's a lot of contaminated material to contend with.
Rare earth elements are used in virtually all electronics, and mining them is a messy business.
If the 81 million U.S. households with yards adopt these practices, they could absorb more carbon and help combat climate change.