Weeds, like most other living things, need sunlight to grow. Therefore, controlling their access to sun is key to controlling their growth in your garden. Repurposing a paper bag from the grocery store allows you to create cost-effective, eco-friendly sun blockers that can be placed in between the rows of your garden, where weeds usually thrive. For aesthetics, raked leaves from your lawn can be saved and used to cover the paper bag strips, which will eventually compost into the earth. And voila! You will now have greater control over the number of weeds that grow in your garden, while using eco-friendly materials that cost you virtually nothing!