Yes we are as sure as we can be about anything in science [1], but even if it did cause some ecological issue it would be worth it given the misery mosquitoes cause.<p>1. <a href="http:&#x2F;&#x2F;www.nature.com&#x2F;news&#x2F;2010&#x2F;100721&#x2F;full&#x2F;466432a.html" rel="nofollow">http:&#x2F;&#x2F;www.nature.com&#x2F;news&#x2F;2010&#x2F;100721&#x2F;full&#x2F;466432a.html</a>