1) How long does it take for a plastic bottle to decompose? 2) Which gas is the most abundant greenhouse gas in Earth's atmosphere? 3) What is the largest source of renewable energy in the world? 4) How many years does it take for a glass bottle to decompose? 5) What does the 3Rs principle stand for? 6) What percentage of the Earth's water is fresh and drinkable? 7) What is the most eco-friendly form of transportation?  8) How much water can you save by turning off the tap while brushing your teeth? 9) What is the most common type of waste found in the oceans? 10) How many trees are estimated to be cut down each year for paper production? 11) How many liters of water does it take to produce one hamburger? 12) What is the most commonly recycled material? 13) When does the Arbor day occur?

Leaderboard

Visual style

Mga Option

I-switch ang template

I-restore ang gi-autosave: ?