Become an Eco Friendly Product Blog Reviewer
Bloggers, especially niche bloggers who have built up an audience get paid solid money to review products and services. In general advertisers are seeking to boost their search engine rankings through links that come along with the review but many are just, or also, genuinely looking to create awareness and drive traffic.
How to get started: There are free blogging platforms such as wordpress and many web hosting companies offer one-step installation of them (for example this site claims you can get a free domain and have your wordpress blog live in 30 minutes!).
How to cash in: Check out sites like blogtoprofit.com or payperpost.com for advertisers looking to hire bloggers. Additionally reviewme.com is a higher level service.
How to really make it: Be honest, write passionately, seek out new and interesting topics - basically become a true resource for interested individuals. Make them want to come back, add your RSS feed, and link to you!