public void HealEarth(float health)
    {
        if (CanAfford(healingCost))
        {
            if (earthHealth.GetHealth() < earthHealth.GetStartingHealth())
            {
                earthHealth.HealEarth(health);
                DeductCost(healingCost);
                UpdateCashText();
            }
        }

        ToggleUpgradeButtons();
        UpdateCurrentHealthText();
    }