How does baking soda kill grass and what are the potential implications of using it as a method of weed control in a lawn or garden?

Baking soda kills grass by altering the pH level of the soil, making it difficult for plants to absorb nutrients. Using baking soda as a weed control method in a lawn or garden can have negative implications, such as harming beneficial plants, disrupting the ecosystem, and potentially contaminating the soil with excess sodium.