Here’s a no-prep plastic water bottle math activity and worksheet for students in 5th, 6th, or 7th grade for Earth Day 2026. Your students will use intermediate math skills to calculate how many plastic water bottles are used on Earth each day. This is a great way to talk about reducing single-use plastic items and increasing recycling- key ideas for Earth Day! Students use their knowledge of:Large numbers (to the billions)RoundingMultiplication and division with large numbersUnit conversio