How to Use "chemical" with Example Sentences

1. Bacteria communicate with their neighbours through chemical signals .
2. Many chemical producers have been asked to cooperate .
3. Chemical use in american agriculture peaked soon thereafter , in 1973 .
4. And as more people participate , both the chemical trail and the overall system grow stronger .
5. The chemical can make meat leaner , but can also be the cause of heart palpitations , diarrhoea and muscle tremors .