in the massive cleanup under way in the gulf of mexico. >> we are sharing knowledge. we are sharing information every time because this is a crisis. it can happen any time, you know? it can happen now. it can happen in this area or a foreign area. >> abu dhabi has learned the hard way. mango trees were severely threatened by an oil spill. he took the lead in rehabilitating the area. >> as you can see, the manni groves are healthy. >> since the spill a water monitoring program has been put in place and sediment tests are done regularly. >> man groves are essentially that they act as filters for west also. so there is a dual function. you would want to see that the water is clean, but also that man groves contribute to making the water clean. >> abdelsalam believes it could