讓牛羊放“袋鼠屁”
2008-12-31 00:00:00
初中生學(xué)習(xí)·低 2008年12期
Eco-friendly kangaroo farts could help global warming:scientists Australian scientists are trying to give kangaroo-style stomachs to cattle and sheep in a bid to cut the emission of greenhouse gases blamed for global warming.
