Current affairs topics related to Botany that you should focus on can include:

1. Plant-based diets and climate change:
- The increasing popularity of plant-based diets as a response to climate change.
- The impact of agriculture and livestock on greenhouse gas emissions.
- The role of plants in carbon sequestration and mitigating climate change.

2. Genetic modification and biotechnology:
- The use of genetic modification in agriculture to enhance crop productivity, disease resistance, and nutritional value.
- The ethical concerns and potential risks associated with genetically modified organisms (GMOs).
- The development of new biotechnological techniques in plant breeding and their implications.

3. Medicinal plants and traditional knowledge:
- The importance of preserving traditional knowledge about medicinal plants and their potential in drug development.
- The challenges faced in the conservation of medicinal plant species.
- The role of botanical gardens and research institutions in promoting the sustainable use of medicinal plants.

4. Invasive plant species and biodiversity conservation:
- The impact of invasive plant species on native ecosystems and biodiversity.
- Efforts to control and manage invasive plant species.
- The role of botanists in studying invasive species and developing effective management strategies.

5. Urban gardening and sustainable cities:
- The growing trend of urban gardening and its benefits for food security, community engagement, and urban ecosystems.
- The role of plants in improving air quality and reducing urban heat island effects.
- Initiatives promoting green spaces and urban biodiversity conservation.

6. Plant diseases and global food security:
- The threat of emerging plant diseases and their impact on global food production.
- Strategies for disease management and plant health surveillance.
- The importance of international collaboration in addressing plant diseases and ensuring food security.

7. Conservation and restoration of natural habitats:
- Efforts to conserve and restore natural habitats, such as rainforests, wetlands, and grasslands.
- The role of native plant species in habitat restoration and ecosystem resilience.
- The impact of human activities, such as deforestation and urbanization, on plant biodiversity and ecosystem services.

By staying informed about these current affairs topics, you will have a better understanding of the intersection between botany and various socio-environmental issues. This knowledge can be valuable in various competitive exams, including the UPSC.