If you're unsure about what to study in college or are perhaps seeking a career change, you've come to the right place. According to the National Geographic, these five green jobs are guaranteed to be around in the future and to ensure our planet is, too.

1. Urban Growers 

Farms, roof gardens, and greenhouses are rapidly popping up in cities and urban areas across America and around the world, making it one of the fastest growing green jobs in 2017. Urban growers are supplying locally grown organic food to not only farmer's markets and grocery stores but to top city chefs, too. What's more is that these green areas can also improve the air quality and insulate buildings found in urban environments.

2. Water Quality Technicians

This important green job provides creative solutions to water quality control problems. Water quality technicians are ultimately responsible for testing and monitoring water supplies and making sure that the water we drink is safe. With increased toxins and pollutants being found in our water and air, this role is highly vital to not only our health but the health of wildlife and the oceans, too.

3. Clean Car Engineers 

Fewer gas emissions. Less pollution. Cleaner air. These are the hopes and dreams of clean car engineers across the U.S. and around the world. According to the National Geographic, "transportation currently burns about two-thirds of America's oil and produces about one-third of its greenhouse gas emissions." So it's up to clean car engineers to provide consumers with quality and affordable electric alternatives to the dirty, gas-guzzling cars you'll find on the roads today.

4. Recyclers 

Thanks to recyclers, two-thirds of all the paper consumed in 2011, in the U.S., was recovered before ending up in landfills, according to the American Forest & Paper Association. With increased recycling, more green jobs are being created which makes for a bigger, more positive impact on the environment. After all, recycling saves energy, water, and reduces greenhouse gas emissions.

5. Natural Scientists 

The Earth's oceans are "dying," according to some and thanks to the demand for products like palm oil, forests are also shrinking – hence the growing need for natural scientists. As the world moves toward a more sustainable future, it's essential that we have scientists who are specialized to monitor our impact on the world around us.