Already, since 2010, drought and insects have killed over 100 million trees in California, most of them in 2016 alone, and wildfires have burned hundreds of thousands of acres.

自2010年以来，干旱和昆虫已经导致加州超过1亿棵树死亡，其中大部分发生在2016年，野火已经烧毁了数十万英亩的土地。

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So far, he has planted more than 1.5 million trees.

到目前为止，他已经种植了150多万棵树。

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SEE ALSO: When 500 Million Trees Fall in the Rainforest...

聚焦：5亿树木在雨林中枯萎。

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Now,the plantation's eight million rubber trees may help fuel that recovery by producing low-cost electricity.

VOA: standard.2009.09.13

Ms Maathai founded the Green Belt Movement, which has planted 20-30 million trees in Africa.

BBC: Kenya's Nobel laureate Wangari Maathai dies aged 71

An additional 1 million trees will be planted this year as well as in 2014 and 2015.

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There are approximately 21, 000 Christmas tree farms in the U.S. that sell 35 million trees each year.

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