Face-to-face conversation is a two-way process: You speak to me, I reply to you and so on. Two-way communication depends (1) _______ having a coding system that is understood by both sender and (2) _______, and an agreed convention about signaling the beginning and end of the message. In speech, the coding system is the language like English or Spanish; the convention that one person speaks at a time may (3) _______ too obvious to mention. In fact, the signals that people use in (4) _______ and meetings are often non-verbal. For example, lowering the pitch of the voice may mean the end of a sentence, a sharp intake of breath may signal the desire to interrupt, (5) _______ the chairman's eye may indicate the desire to speak in a formal setting like a debate, a clenched fist may indicate anger. When these visual signals are not possible, more formal signals may be needed.

1. Being environmentally conscious is not all about plastic bags; it's about making a lot of everyday choices. People can be more environmentally conscious through many actions.

2. Firstly, recycling conserves natural resources, reduces pollution and saves energy. Recycling involves sorting and cleaning up trash to produce “secondary materials” – mainly glass, paper, metal and plastic – for reuse in products. Recycled aluminium, for example, is a particularly valuable resource; manufacturing using recycled aluminium is 92% more efficient than when unused raw materials are used, according to the Aluminum Association. About 40% of the country's aluminium supply comes from recycling, but people are still throwing away nearly $1 billion worth of aluminium cans that could have been recycled every year.

3. Secondly, people should pay attention to plastic bags. They take hundreds of years to break down and cause a particular threat to wildlife. Hundreds of thousands of marine mammals die every year after mistaking plastic bags as food. Many animals get trapped in plastic bags and die. Therefore, people can reduce the number of them when they bring their own bags. Use and reuse all those bags - paper, plastic, cloth - whether or not they are designed to be “reusable.” If they become too old to carry new purchases, use them to pick up litter. And, finally, dispose of them properly - recycle them if you can.

(Adapted from: https://www.usatoday.com/story/money/2019/06/17/climate-change-30-ways-to-make-your-life-more-environmentally-friendly/39366589/)