|I| 11 > | 8.0 | 7.0 |

Manage Dirty Industry Taxes: Raise taxes on dirty industries until they begin to be abandoned. This will generate significant tax revenue while encouraging the transition away from polluting sectors.

Alternative: Strategic High-Tech Placement: Instead of raising taxes, utilize undeveloped areas, particularly those away from residential zones, for high-tech industry. High-tech industry does not pollute, allowing for placement closer to residential areas. This can also increase land desirability near residences, discouraging other polluting industries from moving in. Consider adding parks to the industrial area to positively affect high-tech development.

Demolishing Dirty Industry: Do not demolish dirty industries unless you are out of space or aiming for a pure high-tech city. Even then, ensure that the demand for high-tech industry is high enough to compensate for the loss of profit from dirty industries. If you must demolish, do so gradually as you build, rather than all at once, especially if cash is limited for full reconstruction.

Reconstruction (Method 2): If space is limited and you wish to build high-tech industry, this method involves significant demolition. The primary goal is to clear out polluting industries to make way for high-tech zones.

Raise Taxes for Reconstruction: To facilitate the building of high-tech industries on former polluting grounds, raise taxes to very high levels to encourage polluting industries to leave and stay out.