Teenage pregnancy refers to the condition where a female under the age of 20 becomes pregnant. It can pose challenges due to physical, emotional, and social factors. 

Suicide refers to the act of intentionally causing one's own death, often stemming from deep emotional pain, mental health issues, despair, or a sense of hopeless.

Pollution refers to the introduction of harmful contaminants into the environment, causing adverse effects on air, water, soil, and ecosystems, leading to degradation, health hazards, and ecological imbalances.

Bullying refers to repetitive, intentional harm or intimidation inflicted on others, often through verbal, physical, or social means. It involves a power imbalance, causing emotional or physical distress to the victim.

Abortion refers to the intentional termination of a pregnancy, resulting in the expulsion or removal of the developing embryo or fetus from the uterus before it can survive independently. 

Climate change refers to long-term alterations in Earth's climate, including rising temperatures, shifts in weather patterns, and increased frequency of extreme events, primarily caused by human activities such as burning fossil fuels.