to talk a former mayor of westland in the netherlands and chairman of the netherlands, agricultural and horticultural association. and so now we have, hilda, are not the varies a campaigner for sustainable agriculture. and diversity at greenpeace, netherlands and in reading u. k. richard tiffany, a professor at the university reading and its former director of the center for food security, a very warm welcome to you all mr. tiff and i'd like to begin with you we. we spoke earlier about the power of nitrogen in terms of being a pollutant. what happens to the world if we continue expelling nitrogen at the rate that we are now? what happens to the air to the water, to bio diversity? well, the key thing here is that we're applying nitrogen to agricultural land. well that does is it increases the rights of c missions of nitrous oxide. and nitrous oxide is one of the most polluting greenhouse gases. so there is so the 1st impact will be that we will continue to see trouble warming as a result of human activity. and then on top of that, we applying nitrogen to, to the soil can potentially affect the naturally co system