Activity 3 Directions : Draw a happy face on the space provided if the given situation states changes in the materials that are useful in the environment and sad face if it states harmful effect.
___1. Cutting and shaping of wood/ lumber into chair.
___2. Water on rivers and streams become contaminated with plastic wastes.
___3. Lung infections and other respiratory diseases become rampant due to excessive smoke from factories and motor vehicles.
___4.Cutting of trees in the community.
___5. Vegetable gardening.​