Experts say the world's soil is quietly, invisibly degrading, and it could cause more serious problems long-term than most people realize. How urgent a problem do you consider this?

Szakértők szerint a termőtalaj-pusztulás az egyik legészrevétlenebb, mégis súlyos hosszú távú kockázat.

• Very urgent — one of the biggest hidden crises
• Important, but there are more urgent problems
• Overblown — soil regenerates on its own
• I had no idea this was even a problem