1: "Poison ivy thrives in warm climates."

2: "Increased CO2 levels promote growth."

3: "Urbanization contributes to spread."

4: "Warmer winters extend growing season."

5: "Human activity aids dispersion."

6: "Birds spread seeds further."

7: "Prevention tips to avoid rash."

8: "Identifying poison ivy plants."

9: "Control methods for removal."