Wind-powered ships are back. But will they make an impact?

Now that cars, planes, and ships have wreaked havoc on the environment, some companies are looking to go back to transportation basics: using the wind to sail the sea. How are ships harnessing wind power? The maritime industry currently accounts for almost 3% of global carbon emissions, Reuters reported, so companies and environmentalists alike are hoping to change sea travel to be more sustainable. Agriculture giant Cargill launched the maiden voyage of its cargo ship, the Pyxis Ocean, fitted w...