
Planting more reflective versions of crops could cool off the regional temperatures in summertime, reducing the impact of increasing global temperatures in these areas. Increasing the reflectivity of crop plants by 20 percent could decrease temperatures in a given area by about one degree Celsius. The idea is not to think about changing what crops you plant, but rather to look within the variety of crops you might plant. This might mean choosing a more reflective variety of wheat for example. About 11 percent of the global land surface is devoted to crops and planting all of the world's crops with more reflective varieties would not be enough to reduce climate change worldwide but it could take the edge off of the regional temperature increases as the climate warms. Several things change the reflectivity of a crop, including the amount and composition of the wax on the leaf surface and even how hairy the leaves are. Changing the wax can also change the plant's water retention which could change crop yields for the better in arid regions. Genetic engineering could be used to improve reflectivity but the team's intention is to start with conventional crop breeding to create more reflective crops. This is an interesting idea because if you think about it, in warm areas, that is one degree that we don't have to turn up the air conditioning which, in a large scale, greatly improves the amount of carbon emissions in the air. I'd be interested to see what the results from this study are and hopefully other areas will follow up on this.
Link to site: http://news.discovery.com/earth/reflective-crops-climate-change.html




