For a kitchen that's kind to the environment, choose material that are natural and have longevity such as hardwoods, stones and metals (cast iron or pewter rather than softer types like stainless steel).
Don't be afraid to step away from fashion trends and aim for more classic look. Hand-painted cabinetry is particularly adept at matching future tastes, because it can be repainted at any time. But make sure the paint you use is high quality, water-based one to save polluting your home atmosphere with toxic fumes.