most important thing you can do to boost biodiversity. 0ur climate editor justin rowlatt has been doing some digging quite literally on this story. actually, the water is really clear, isn't it? we are on a night—time safari to one of the most biodiverse and threatened habitats in the uk. there are lots of insects. look at that! we are visiting one of the country's ponds. that is so good! i've never seen a toad there before. ponds are home to an extraordinary range of plants and animals but it is estimated that 90% of the country's lowland ponds were lost in the 20th century. that is more than 0.5 million ponds gone. and that is why it is essential we protect those we have left. this network of ponds in herefordshire is particularly