I've been using strong vinegar for weed control on my property for a few years now. You do have to be careful about applying it and watch the over-spray because it is not a targeted herbicide like Roundup, it's going to kill grass and broadleaf plants alike. Sometimes I lay down a tarp to mask off the grass border, for example. But if you have a general weedy area that just needs to be knocked down, or a gravel path/driveway to keep clear, I have found it is just as effective, quick-acting, and long-lasting as the synthetic herbicides, with the side effect of smelling like salad dressing, instead of smelling like cancer.

I buy 30-45% concentrate depending on what is on sale, and dilute to around 10% for new weeds and 20% for full grown weeds. A little dish soap in there helps it wet down the leaves. For lawn weeds, once they are under control, I've been able to keep up with a 1/4 acre lawn with just manual weeding. Good tools help, I have tried a lot of weed pulling gadgets. Using a push mower means I go slow enough to spot them, and if they get too big they jam the mower so I am motivated to pull them while they are still small.