Temperatures were among the highest in the U.K. today here at Kew Gardens. A scorching（烧焦） 37.7 degrees. So those who braved the sunshine came prepared. And climate scientists are now confident（确信的） that heatwaves are more likely and more extreme because of climate change. The fact that we've seen these temperature rises（ 上升）, the baseline temperature has increased by about one degree globally（世界上） since pre-industrial（工业的） times, and it's that level that just means in normal conditions we'd see heatwave conditions and temperatures around kind of just above average, but you have that extra layer（层） of heat on, that's when we start to break those records.

  And globally over the last century the trend（倾向） is clear. It has been heating（使激动） up. The last four years were the warmest ever recorded. For the future, the temperature increase depends on global（全球的） carbon（碳） emissions（(光、热等的)散发）. Current（当前的） targets that governments have signed up to to limit（限制） those emissions（(光、热等的)散发） will see a rise（ 上升） of about 3.3 degrees by 2100. Under the Paris climate agreement（同意）, that's the more ambitious（野心勃勃的） deal（买卖） signed up to by almost 200 countries in 2016.

  The aim（目的） is to keep that below 1.5 degrees. Today of all days we've come to the hottest glass house in Kew Gardens. This is where all the desert-adapted（使适应） plants live, and even for these plants they've opened all of the windows to try and get some ventilation（通风设备） in here. Because according（使一致） to my thermometer（温度计） it is now more than 39 degrees in here, and these plants are adapted to the hottest, driest conditions on earth. It's those adaptations（适应） that scientists here are studying in order to work out how we might grow more drought（干旱）-resistant（抵抗的） plants in the future. While the collections（搜集） here look exotic（异国情调的）, they contain plants that could eventually（终于） become familiar（熟悉的） food crops（农作物）.

  Days like（喜欢） today tell us that if we carry on doing exactly what we've done in the past, then that's not going to work. So we're going to have to adapt what we do and potentially（潜在地） adapt（使适应） the crops（农作物） we grow. And so we need to be exploring（探险）, we need to be researching, we need to understanding our options so that we can change as climate begins to bite（咬）. With the gardens baking（烤） in the sun today, the preparation（准备） continues for a warmer, more uncertain climate in the future. A scorching 37.7 degrees, so those who braved the sunshine came prepared. And climate scientists are now confident that heat waves are more likely and more extreme because of climate change.

  And globally, over the last century, the trend is clear. It has been heating up. It's those adaptations that scientists here are studying in order to work out how we might grow more drought-resistant plants in the future. With the gardens baking in the sun today, the preparation continues for a warmer, more uncertain climate in the future. Hi, thanks very much for watching our video.