There is a that are to and . A new study that by human have also had a . They’ ve led to a in plant . Our Roger .

大家都有一个科学共识，那就是二氧化碳排放量增多导致全球变暖以及气候变化。一项新研究表明，人类活动引起的二氧化碳水平也有积极影响，即它会大大促进植物生长。本台环境分析家罗杰•哈拉宾对此做出了解释。

Today’s study in the has been by a team from eight 。 Using data, they that a and a half of the earth’s land has over the -three years since the began。 That’s to more than four giant trees, the trees on the 。 The say the has fuel the plant boom along with more in the and in land 。

But they that of the has been by more of our of CO2 is a plant 。 This is good news as soak up the , they are the pace of by the out of the 。 Some about the of the say this there is less need to worry。 But the paper’s lead from says the from is by other , sea ice, , ocean and more。

今天，来自八个国家的团队在《自然》杂志上发表了研究文章《气候变化》。他们借助卫星数据计算出地球上四分之一到一半被植物覆盖的土地比30年前有记录以来绿意更浓，相当于40多亿棵巨杉树——地球上最大的树。科学家称，全球气温逐渐升高，同时环境中氮气增多，土地流转加快，有助于供给植物生长。但据他们估计，70%的变化是由植物吸收更多我们排放的二氧化碳引起的，因为二氧化碳是植物养料。这是个利好消息，因为植物吸收碳，使大气中的碳减少，从而稍稍降低气候变化的速度。一些质疑气候变暖危害的人说，这证明我们更不需要担心了。但来自波士顿大学的这篇文章的首席作者称，绿化的益处被其他气候影响盖过了，比如海冰融化、气温升高和海洋酸化等等。

If we tally the and the of too much in the air, the net is .

如果我们计算空气中二氧化碳过多的益处和危害，那么有效效应是一个大负数。

And there is , the say if the don’t cut as they , there will come a point where the warms so much that the of to soak up some of our CO2 is by the that will be from soils up in the heat. No one knows when that will .

另外一个警告：各作者称，如果政府不按照约定减排，总有一天气候变暖加剧会导致植物吸收我们部分二氧化碳的能力招架不住土壤在高温下枯萎所释放出的碳。谁也不知道这一刻何时到来。

The BBC’s Roger .

BBC环境分析家罗杰•哈拉宾报道。

Now do you have a for red and black? You may want to that. A study in the US has found the have a for some . The BBC came in to the ’ .

你有没有偏爱红色和黑色？那你得重新考虑这个问题了。美国一项研究发现臭虫对某些颜色有偏爱。BBC健康编辑米歇尔•罗伯茨做客解释了科学家的这些发现。

They got lots of these adult and they put them in a dish. And with of tent-like card of , they found that the seem to red or black the ones that they didn’t like were the and the green.

他们捉了许多成年臭虫，放到一个盘子里。借用不同颜色的像帐篷一样的三角卡片，发现似乎红色和黑色更吸引臭虫，臭虫不怎么喜欢黄色和绿色。

Any why they ?

他们为什么会喜欢某些颜色，有什么说法吗？

It’s to know.

这个很难知道。