Present Tense1. Present Simple Definition: Describes habitual actions, universal truths, or facts. Syntax: Subject + base verb (s/es for third-person singular) Example: She dances every day.2. Present Continuous Definition: Describes actions happening right now or in progress. Syntax: Subject + is/am/are + verb(-ing) Example: She is dancing right now.3. Present Perfect Definition: Describes actions completed at some point in the past with relevance to the present. Syntax: Subject + has/have + past participle Example: She has danced at many events.4. Present Perfect Continuous Definition: Describes actions that started in the past and are still continuing. Syntax: Subject + has/have been + verb(-ing) Example: She has been dancing for two hours.Past Tense5. Past Simple Definition: Describes actions completed in the past. Syntax: Subject +
Environmental PollutionEnvironmental pollution is a global crisis that poses a significant threat to the health of our planet and its inhabitants. It is caused by the introduction of harmful substances into the environment, resulting in adverse effects on air, water, soil, and living organisms. As human activities continue to expand at an unprecedented rate, pollution has become one of the most pressing challenges of our time. Air pollution, a major component of environmental pollution, is caused primarily by emissions from vehicles, factories, and the burning of fossil fuels. Pollutants such as carbon monoxide, sulfur dioxide, and nitrogen oxides not only degrade
