EFFORTS to tackle climate change include heavy investment in renewable sources of electricity around the world. Solar power saw the biggest leap in 2010, with the installed base jumping 70% compared with 2009 to 40 gigawatts. Wind power also grew strongly, adding 24% of generating capacity. Yet the biggest source of renewable electricity, hydropower, and the smallest, geothermal, both only added 3% to capacity. Finding usable sources of either is becoming increasingly hard or costly. The region that saw the biggest growth in renewable energy projects was power-hungry Asia. Investment in renewables also saw the biggest leap since 2007, with $243 billion spent, a 30% increase over 2009.
1. 表示增加的词：grow， growth， jump， increase， climb， rocket，soar，leap。
2. 除了在图表分析中用saw加趋势，也可以用** witnessed an increase + data+time
或者 there was an increase in **+data+time
3.可以用副词来形容幅度，比如幅度大：strongly，dramatically， considerably， remarkably，
substantially 和 significantly。