The United States has made progress on environmental protection through laws and regulations since the 1970s, but still has work to do. While manufacturing companies now comply with environmental regulations and recycling has increased, issues like conserving water and protecting wildlife still require long-term comprehensive planning. In response, many cities and universities have formed sustainability offices and adopted green plans using new technologies. However, continued highway expansion promotes sprawl and vehicle emissions, threatening species through habitat loss and collisions. More sustainable transportation options like light rail are needed.