(1) From Material 2, we learned that plastic bags have potential harm to agricultural development, animal survival, land occupation, etc.; (2) While plastic shopping bags provide convenience to consumers, they also Excessive use and insufficient recycling have also caused serious waste of energy, resources and environmental pollution; (3) The slogan of "Reduce the Use of Plastic Bags" can be: Reducing "white pollution" starts with me.

So the answer is: (1) agricultural development; animal survival; land occupation; (2) reducing energy waste and environmental pollution; (3) reducing "white pollution" starts with me.