高中人教版 (新课标)Unit 4 Earthquakes图片课件ppt

这是一份高中人教版 (新课标)Unit 4 Earthquakes图片课件ppt，共11页。PPT课件主要包含了读有所获，练有所得，词汇积累，长难句分析，学有所益等内容，欢迎下载使用。
With revenue（收益）frm pig prducts getting smaller every year, sme farmers frm rural England have decided t make sme extra mney by turning p int prfit.James Hart, wh runs a pig farm, came up with a simple slutin f using lts f pig faeces, cw dung and chicken drppings n his farm t generate electricity.
It may lk unremarkable frm the utside, but inside Glebe Farm there is a state-f-the-art bigas statin. It's ne f nly a few in the UK, which has been slwer than many f its Eurpean neighbrs in develping renewable energy such as wind turbines and slar panels.
S hw des it wrk? Large quantities f animal waste are mixed with lts f grass in a twer. Bacteria then break it all dwn, prducing methane(沼气），which is siphned ff（吸），cleaned and filtered（过滤).The gas is then used t pwer an engine which in turn pwers a generatr. The electricity frm this is then fed int the Natinal Grid. Mr. Hart thinks he'll be able t sell 2.2 millin kilwatt hurs f electricity every year.
The heat generated by the prcess is als captured and used fr central heating at the farmhuse.But it's nt nly Glebe Farm which benefits. Methane is ne f the mst pwerful greenhuse gases-20 times wrse than carbn dixide in trapping heat in the atmsphere. By capturing s much f it, Mr. Hart expects t reduce his carbn ftprint by abut 10,000 tnnes a year.
James Hart says he's pleased because he's managed t find anther surce f incme and imprve his envirnmental impact.