The impromptu speech on cherishing food and refusing to waste is as follows:

1. Saving food and putting an end to waste are making contributions to environmental protection. Saving food and protecting the environment seem to be "irrelevant", but there is a close relationship: food production consumes cultivated land, water, oil, gas, electricity and other resources, and the use of pesticides and fertilizers, disposable tableware, and unclassified kitchen waste will all cause environmental pollution.

2. Unreasonable demand and waste of food is disorderly consumption of limited resources. Reducing waste and practicing economy is an integral part of low-carbon life and green economy, and it is also an effective measure to promote sustainable development.

3. Saving food and putting an end to waste is to cultivate a good family style. When I was a child, we would recite the poem "Who knows that every grain of food is hard"; Many people have childhood memories of rice grains falling on the table and being picked up and eaten by adults.

4. It is in this kind of inheritance from generation to generation that we understand the preciousness of food. Nowadays, life is better, but the thrifty "heirloom" is never out of date. This requires parents to set an example, educate their children to tighten the string of thrift from an early age, and form a respect for hard-working farmers, workers, catering service personnel and other workers.

5. Cherish food, order meals in moderation, avoid leftovers and reduce waste. Don't compare, be proud of saving and be ashamed of wasting. Fill as much as you eat at dinner, and don't throw away leftovers.