Google is actually responsible for most of the smells. They have been planting what are known as "stupid tech nerd stink stations" all over town, spouting bad ideas, smells, and general uselessness all over the city. It's a real problem. They don't contribute to society in ay meaningful way, and now they're using the equivalent of the 1980s toy "stink'ums." Rumor has it they were upset that there wasn't literal human shit all over the streets like in San Francisco, so they're trying to recreate a comfortable environment for themselves. It's also why there is a rise in homelessness. Without people suffering all around them, Google just can't operate with efficiency. Human suffering is joy to the average tech worker.