There are options for concrete that are more environmentally friendly: some decorative concrete colors have higher SRI (solar reflectivity indexes) than plain gray concrete so they reflect more infrared light which results in lower temperatures. They can actually be used to help achieve LEED certification in building projects.
Also, there is pervious concrete which has many voids in the mix which allows water to percolate down into the ground instead of running off into storm drains!
Concrete is an environmentally friendly building material in all stages of its life span, from raw material production to demolition, making it a natural choice for sustainable construction.
Resource efficiency - The predominant raw material for the cement in concrete is limestone, the most abundant mineral on earth. Concrete can also be made with fly ash, slag cement, and silica fume, all waste byproducts from power plants, steel mills, and other manufacturing facilities.
Durability - Concrete builds durable, long-lasting structures that will not rust, rot, or burn. Life spans for concrete building products can be double or triple those of other common building materials.
Thermal mass - Structures built with concrete walls, foundations, and floors are highly energy efficient because they take advantage of concrete’s inherent thermal mass or ability to absorb and retain heat. This means significantly lowered heating and cooling bills with smaller-capacity HVAC equipment.
Reflectivity - Concrete minimizes the effects that produce urban heat islands. Light-colored concrete pavements and roofs absorb less heat and reflect more solar radiation than dark-colored materials, such as asphalt, reducing air conditioning demands in the summer.
Minimal waste - Concrete can be produced in the quantities needed for each project, reducing waste. After a concrete structure has served its original purpose, the concrete can be crushed and recycled into aggregate for use in new concrete pavements or as backfill or road base.
I admire your sense of environmental stewardship! But if you dig a little deeper you'll find that your statements are only scratching the surface on this issue.