Fossil fuels, such as coal, oil, and natural gas, are non-renewable energy sources because they are formed from the remains of ancient plants and animals and take millions of years to replenish.

Carbon dioxide is the primary greenhouse gas emitted by human activities, primarily through the burning of fossil fuels for energy production and transportation.

Agriculture, particularly the clearing of forests for farming and grazing land, is a major cause of deforestation worldwide.

Reduce refers to the first step in the waste management hierarchy, which aims to minimize the amount of waste generated in the first place.

Walking, cycling, public transportation, and driving a hybrid car are all considered sustainable transportation options because they reduce greenhouse gas emissions and promote healthier lifestyles.

Recycling refers to the process of converting waste materials into new materials and objects, reducing the need for raw materials and minimizing waste.

Industrial waste, agricultural runoff, sewage discharge, and oil spills are all major sources of water pollution, contributing to contamination and degradation of water resources.

Composting refers to the process of breaking down organic waste, such as food scraps and yard waste, into a nutrient-rich soil amendment that can be used to improve soil health and fertility.

Organic farming, permaculture, and agroforestry are all sustainable agricultural practices that aim to minimize environmental impact, promote biodiversity, and ensure long-term soil health and productivity.

Upcycling refers to the process of transforming discarded objects or materials into new items of higher quality or value, extending their lifespan and reducing waste.

Vehicle emissions, industrial emissions, power plants, and deforestation are all major sources of air pollution, contributing to poor air quality and health risks.

Reduce refers to the first step in the waste management hierarchy, which aims to minimize the amount of waste generated in the first place.

Solar, wind, and hydroelectric power are all considered sustainable energy sources because they are renewable and do not produce greenhouse gases.

Waste-to-Energy refers to the process of converting waste materials into usable energy, such as electricity or heat, through incineration or other technologies.

Deforestation, fossil fuel burning, industrial emissions, and agriculture are all major contributors to climate change, leading to increased greenhouse gas emissions and global warming.